"Self-impose hard constraints to force creative precision Billie and Finneas described a self-imposed rule that made their recording process dramatically harder: 'one of the stupid rules we've given ourselves is we don't use any pitch correction.' This forced them to nail exact doubles vocally — every syllable, breath, and pitch had to be genuinely perfect, not fixed in post. Adopting deliberate constraints on your craft — no shortcuts, no easy fixes — forces a level of skill-building and attention to detail that polished, corrected work rarely demands. Source: Billie Eilish & Finneas O'Connell, Spotify, Bad Guy Song Breakdown"